1. Key
GENERAL CHEMISTRY-I (1411)
S.I. # 1
1. Chemistry is the study of:
the properties of materials and the changes that materials undergo.
2. Matter is:
anything that has mass and occupies space.
3. What is a homogeneous mixture? A mixture that is uniform throughout.
Homogeneous mixtures are also called: _________________. solutions
Give an example:____________________. air
4. What is a heterogeneous mixture? A mixture that varies in composition, properties,
and appearance throughout.
Give an example: ____________________. Rocks or wood
5. All Gaseous Mixtures are all _________________________. Homogeneous
6. Define intensive and extensive properties of a substance and give examples.
Intensive: Do not depend on the amount of a substance.
temperature, melting point, and density. Used to identify substances
Extensive: Does depend on the amount of a substance.
Mass, volume.
7. Define Accuracy & Precision:
Accuracy: refers to how closely a measured value agrees with the correct value
(hitting the bulls eye)
Precision: refers to how closely individual measurements agree with one another.
(hitting the same spot repetitiously)
6. Give the common s.i. unit and symbol used for:
Mass Kilogram kg
Length Meter m
Time Second s
Temperature Kelvin K
Amount Mole mol
Area Length times Length m2
Volume Area times Length m3
Density Mass per unit kg / m 3
Speed Distance per unit m/s
2. Key
NOMENCLATURE: Give the name or formula for the following
1. H Elemental Hydrogen
2. F Elemental Fluorine
3. Cl Elemental Chlorine
4. I Elemental Iodine
5. N Elemental Nitrogen
6. O Elemental Oxygen
7. Nitrogen N2
8. Oxygen O2
9. Argon Ar
10. Carbon Dioxide CO2
11. Neon Ne
12. Helium He
13. Krypton Kr
14. Xenon Xe
15. Sulfuric Acid H2SO4 (aq)
16. Calcium Oxide CaO
17. Ammonia NH3
18. Ammonium NH4 +
19. Phosphoric Acid H3PO4 (aq)
20. Sodium Hydroxide NaOH
